交通工程学习题答案

is one of the practical form of values. The so-called values refers to the objective things are of no value and the value of fundamental perspective. Different values, peoples behaviour, attitudes, ways are different. People-oriented focus on human value and reality, we need the broadest masses as values. Adhere to people-oriented values, is to make the economy more development, improve democracy, cultural prosperity, and live a happier; is deeply concerned that human development and human values, development of social and human development of rational unified, insisted in the material civilization, political civilization and spiritual civilization in the overall advancement of Socialist civilization to a higher level. Also want to see that persons value is not only meet your needs, also is to meet the needs of others and the community. Adhere to people-oriented, to strongly advocate every community member, serve others, beneficial to the community of people. The so-called Outlook, attitude is on the record, including who, how to create a record of achievements, how to evaluate performance, and so on. What values, what kind of Outlook. Adhere to people-oriented Outlook, is on the premise of respecting the interests and power of people, creating a popular, warm hearts, steady heart performance, creating serve for one officer, the benefit of achievements, and overall construction of well-off society and promoting the all-round development of peoples performance. Achievement evaluation in both economic accomplishments, take another look at the effectiveness of social progress; changes in both urban and rural change; both hard environment to strengthen and take another look at the soft environment improvement momentum of development at present, depending on the potential for sustainable development. Leave people to talk about values are worthless and leave people to talk about Outlook is not what the performance. 4. people responded to the starting point of the question, and replied to questions point. Man is the sum of social relationships. We cannot leave the chichuanyongdu, housing, tourism and entertainment, entertaining, and even certain political, economic, cultural and social environment, and so on. Due to human needs, all walks of life will come into being. People create for their survival, and continue enjoying the results of the construction. Colorful in the transformation of the people of the world, community vitality in the creation of man. Therefore, any work we do, the starting point is human, what are people. Us speed up development, the core of which is to meet the needs of people, including survival needs, emotional needs and self-actualization needs. It should be noted that people are not machines, not the slave of an object, not to be controlled. People have their own personality, has its own personality, has its own dignity. Person in need of care, you need to understand, need to meet. It is said that in the agricultural society, people plant; in industrial society, man is an animal; the information society, return交通工程学习题解习题2-1解： 小时交通量： 5min高峰流率： 15min高峰流率： 15min高峰小时系数： 习题2-2解：已知： 设计小时交通量： 车道数： 该道路需修6车道。 注：此题。 如果，。习题2-3解： 辆/h 车头时距： s/辆 车头间距： m/辆 车流密度： 辆/km 第一辆车通过时间： h习题2-4解: 习题3-1解：已知：t东=2.0 min， t西=2.0 min，X东=29.0 辆， Y东=1.5 辆X西=28.6 辆， Y西=1.0 辆1、先计算向东行情况： 2、再计算向西行情况：习题3-4解：总停驶车辆数 = 28 + 25 + 38 + 33 = 124 辆 总延误 = 12415 = 1860 辆s每辆停车的平均延误 = 总延误/停车辆数 = 1860/113 = 16.46 s交叉口引道上每辆车的平均延误 = 总延误/引道上总交通量 = 1860/（113+119）= 8.02 s停车的百分数 = 停车辆数/引道上交通量 = 113/232 = 48.7%取置信度90%，则K2 = 2.70，于是 停车百分比的容许误差 = 取置信度95%，则K2 = 3.84，于是 停车百分比的容许误差 = 习题4-2解：已知：畅行速度；阻塞密度； 速度与密度为线性关系模型。 最大流量：因 辆/km km/h 辆/h。 此时所对应的车速： km/h。习题4-4解：已知：N = 56，车辆到达数实测频数0123456789011141195321056011283336251814801730.04550.14060.21720.22370.17280.10680.05500.02430.00940.00322.5487.87312.16312.5279.6775.9813.0801.3600.5250.180 对于泊松分布，把小于5的进行合并，并成6组，可算出 由DF=6-2=4，取，查表得： 可见此分布符合泊松分布。习题4-5解：已知：交通流属泊松分布，则车头时距为负指数分布。交通量，。 车头时距的概率： 车头时距时出现的次数： 次数为：（辆/h）。 车头时距时车头间隔的平均植：车头时距 频 率频 数此时段到达的车辆数61624671163388323960171043121131912226131651411315821666平均值：习题4-9解：已知：Q=1500辆/h，每个收费站服务量为600辆/h。 1按3个平行的M/M/1系统计算 ，系统稳定。，而对于三个收费站系统，2按M/M/3系统计算，系统稳定。习题4-10解：已知：V1=50km/h，Q1=4200辆/h，V2=13km/h，Q2=3880辆/h，V3=59km/h，Q3=1950辆/h，t =1.69h1. 计算排队长度 k1=Q1/V1=4200/50=84 辆/km，k2=Q2/V2=3880/13=298.5 辆/kmVw=(Q2Q1)/(k2k1)=( 38804200)/(298.584)= 1.49 km/hL=(01.69+1.491.69)/2=1.26 km2. 计算阻塞时间 排队消散时间t 排队车辆为：(Q1Q2)1.69=(42003880)1.69=541 辆疏散车辆数为：Q2Q1=19503880 = 1930 辆/h则排队消散时间： 阻塞时间：t= t+1.69 = 0.28 + 1.69 = 1.97 h习题5-1解：已知：，大型车占总交通量的30%， ，平原地形。查表5-3， 取设计速度为100km/h，二级服务水平，一条车道的设计通行能力：车道数： 故该高速公路修成6车道。习题5-2解：已知：L1=300m、R=0.286、VR=0.560、V=2500 pcu/h L2=450m、R=0.200、VR=0.517、V=2900 pcu/h第一段：计算非约束情况下的交织车速SW及非交织车速SnW 非约束情况下型式B的常数值如下： a b c d SW 0.1 1.2 0.77 0.5 SnW 0.02 2.0 1.42 0.95 利用式（5-8）计算 核查交织区段诸限制值： ， ， 确定服务水平：查表5-10， 属于二级， 属于二级。第二段：计算非约束情况下的交织车速SW及非交织车速SnW利用式（5-8）计算 核查交织区段诸限制值： ， ， 确定服务水平：查表5-10， 属于三级， 属于三级。习题5-3 北解：已知 T=60s，三相式固定周期。 大车小车 = 28，l = 0.1。 由题意分析可知，交叉口各进口道的车行道区分为专用左转和直右两种。 西 东 计算直行车道的设计通行能力，用公式（5-23）。取t0=2.3s，=0.9。绿灯时间tg=(60-23)/3=18s。 据车种比例28，查表5-32，得ti=2.65s。将已知参数代入公式（5-23），则 南 计算直右车道的设计通行能力，用公式（5-24）： 各进口属于设有专用左转车道而未设右转专用车道类型，其设计通行能力用公式（5-30）计算： 该进口专用左转车道的设计通行能力，用公式（5-31）计算： 验算是否需要折减 因T = 60s，所以n = 3600/60 = 60，不影响对面直行车辆行驶的左转交通量： 本题进口设计左转交通量，不折减。 交叉口的设计通行能力交叉口的设计通行能力等于四个进口设计通行能力之和。因本题四个进口相同，故该交叉口的设计通行能力为：对于图2，南北进口的设计通行能力计算如下： 北 计算直右车道的设计通行能力，用公式（5-24）： 计算直左车道的设计通行能力，用公式（5-25）： 西 东 验算北进口左转车是否影响南进口车的直行 南，不折减。 交叉口的设计通行能力交叉口的设计通行能力等于四个进口设计通行能力之和。因本题东西进口相同，南北进口相同，故该交叉口的设计通行能力为：主蒸汽管道和高温再热蒸汽管道分别从过热器和再热器的出口联箱的两侧引出，然后汇成一根母管，到汽轮机前再分成两根支管分别接入高压缸和中压缸左右侧主汽关断阀和再热关断阀。Now, we are in a new historical stage of all-round construction of a well-off society. In perform duties, and carried out work of process in the, we to put people as a guide principles, and a test standard, efforts from masses most hope do of things do up, from masses most care of hot problem grabbed, from masses most not satisfaction of place modified up, not make nominal of formalism, not do grandstanding of cosmetic, to seeking of style, help masses share, is people benefit. (C) the investee people is not only an idea, it is a job requirement. Philosophy through to the people-oriented thought in the work of the Office, must be clear work objectives. Party Office in the city this year remains: Advanced civil strife, local brand. The County (City) Party Committee offices and units directly under the Office to hold high the banner of first to excellence, people-oriented requirements, strengthen the construction and management of the Office towards the work a higher level. Investee 1. political participation based on conspiracy to adhere to people-oriented, will be around to promote coordinationDevelopment events, great searchings. The 16 session of the partys scientific Outlook on development, is the new Central collective leadership to the development of connotation, development essentials, further deepen the essence of development and innovation, is our partys ruling idea a leap. At present, establishing and implementing the scientific concept of development has become the partys important work. As the Office of party Committee, working party should service center, initiative to claim leadership of the decision, the current focus is to focus on promoting comprehensive, coordinated and sustainable development with more suggestions, do more research, summarized the typical. One is drafted to raise the level of your presentation. Your presentation is the main Office of products, is the basic carrier staff service, is important to measure service levels. The quality of your presentation, mainly depends on how much we drafted a document recognized by the leadership, how many are listening to the people in favour of the report, how many paid dividends in the practical work. Improve presentation drafting level, requ